How about a desk space for this area?

Chair or chaise for reading nook? What would be most useful for you? Dresser, desk or chair?

You can have a countertop made to create a computer/desk area.

What would be a feature that you could see yourself using? Lots of ways to utilize and maybe look on line to see what appeals to you. (Ignore the styles below and decorate to suit your room.)

Desk or make up vanity

Banquette with or without storage

Reading area

A ledge for pictures/plants and book storage

Also consider a custom treatment on arch that matches your blind.